//////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2004-2020 musikcube team
//
// All rights reserved.
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// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
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//    * Redistributions of source code must retain the above copyright notice,
//      this list of conditions and the following disclaimer.
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//////////////////////////////////////////////////////////////////////////////

#pragma once

#include <cursespp/OverlayBase.h>
#include <cursespp/TextInput.h>

namespace cursespp {
    class InputOverlay:
        public OverlayBase,
        public sigslot::has_slots<>
    {
        public:
            struct IValidator {
                virtual bool IsValid(const std::string& input) const = 0;
                virtual const std::string ErrorMessage() const = 0;
            };

            using InputAcceptedCallback = std::function<void(const std::string&)>;

            InputOverlay();
            virtual ~InputOverlay();

            InputOverlay& SetTitle(const std::string& title);
            InputOverlay& SetText(const std::string& text);
            InputOverlay& SetInputAcceptedCallback(InputAcceptedCallback cb);
            InputOverlay& SetValidator(std::shared_ptr<IValidator> validator);
            InputOverlay& SetWidth(int width);
            InputOverlay& SetInputMode(IInput::InputMode mode);
            InputOverlay& SetAllowEmptyValue(bool allowEmptyValue);

            virtual void Layout();
            virtual bool KeyPress(const std::string& key);

        protected:
            virtual void OnVisibilityChanged(bool visible);
            virtual void OnInputEnterPressed(TextInput* input);
            virtual void OnInputKeyPress(TextInput* input, std::string key);

        private:
            void Redraw();
            void RecalculateSize();

            std::string title, text;
            int x, y;
            int width, height;
            int setWidth;
            bool allowEmptyValue;
            std::shared_ptr<TextInput> textInput;
            std::shared_ptr<IValidator> validator;
            InputAcceptedCallback inputAcceptedCallback;
    };
}